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J. GAPRON. `IILIIG'IRIGAL INDICATOR IOR SPEAKING TUBES, N Y Ne. 283,073. Patented Aug. 1.4, `1883.

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13e-MW@ \\bu/ M @1M 2 Sheetsf--Sheert 2 (No Modelf) J. CAPRON. ELECTRICAL INDICATOR FOR SPl'AKIBTGr TUBES. No. 283,073.

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ELECTRICAL INDICATOR FCRSPI-:AK-"INe-TLIaI-:sl

SPECIFICATION `forming* part of LetterslPatent No. 283,073, dated August 14, 1883. j l

l .application filed February 5, 1893. (No model.) 4

TI all whom, it may concern.- s

York city, county of New York, and State of New York, have invented new and useful Improvements in Electrical Indicators for Speaking-Tubes, and I do herebydeclare that the following is a full and exact descriptionof the same, reference being had to the accompanying drawings, and I tothe lletters of reference marked thereon. V

' This invention consists, mainly, in the com-` bination of the"armature-plate of an electromagnet, having a stud or pin projecting therefrom, with the hingedlcover-plate of a name or `number indicator. It consists, further, in the combination of the foregoing with certain other parts, as will be fully described hereinafter.

In the drawings, `Figure 1` represents a front view of my invention 5 Fig. 2, a top view of the same, Fig. s 3, a vertical sectional view; Fig. 4., a rearviewyand Fig. 5, a detached view, illustrating the action Iof the armatureplate in throwing down the cover-plate of the indicator. l To enable others skilled in the art to Imake my invention and properly use the same, I will proceed to describe fully its construction and 4manner of operation.V

A represents a base or foundation piece of any proper form and size,which is adapted to be secured to the wallby screws or other proper fastenings. l

a represents a face-.plate secured to the basepiece in any proper manner, whichV is provid` ed withthe opening a', Fig. 1,-for the proj ec- `tion ofv the` stud or pin of the armature-plate, hereinafter referred to, with recesses ai for the slip or plate upon which the indicator name 'or number is inscribed, and with extensions a of the speaking-tubes, adapted to take the mouth-pieces, as shown.

B B represent the mouth-pieces ofthe spea ing-tubes, anynumber of `which may be attached to a face-plate ofproper size by means `ofaeorresponding number of extensions, a.

b represents the hinged cover of the mouthpiece, which is provided with the handle b", as

shown. f I v I s Y b2, Fig. 4, represents one of the speaking- `tubes extending-away to any desired point in the building, in the manner well understood C C represent the indicators, which maycon- L i sist of slips or plates havingthe proper-name Be it known that I, JACOB OAPRON, of New 1 or number inscribed thereon, which are inserted in the recesses a'l of the face-plate, as shown in Fig. 3. lf desired, however, the

name or number may be inscribed directly uponthe face-plate itself.

c c represent thecover-plates of the indicators, which are hinged to the face-plate in any s proper manner.

s D represents the coil of an electro-magnet located in convenient proximity to the openinga in theface-plate, upon the rearside of the latter, which is providedat each end with a polar extension, d, as shown in Fig..

E represents an armature-plate hinged to any proper supports in convenient proximity f to the coil, in such manner that when inV iis normal position it does not lie incontact with thefsurface d, but at a little distance therefrom, as shown in Fig. 3.

e represents a stud or -pin attachedto the lower edge of the armature-plate, which is adapted to project through the opening a of the face-plate, to throw down the cover-plate of the indicator when the armature-plate is moved from its normal` position into contact with the bearing-surfaces d d, as shown in 1,. riga..

F represents a pair of vertical coils,lo'cated at any convenient point; and f, Fig. 3, a standard supporting a bell. I

Gr represents an armature-plate, which ,when 4in its normal position, Iis held out of Contact with the adjacent ends of the coils by the action of gravitation, but is capable of being swung up against them when moved by a proper force. I I

g represents the tongue of the bell, which i-s attached bymeans of a proper rod or shank, g', to the armature-plate G, as shown.

H represents a movable button, located at any proper point in the building, which rests against the spring h, the free end of which latter lies, when in its normal position, in close proximity to the plate h', but not in Contact therewith. The spring hand plate h form the terminals of acircuit which extends through the coils D and F. I 's A separate electro-magnet,ID, and armature E must be employed foreach indicator; but the same signal-bell will answer for all theseries.

The operation is as follows: When the parts are in their normal positions, the cover-plate of the indicator is closed, and the electrical circuit is broken by the non-contact of the spring h with the plate h. By pressing in the button H these parts are caused to come in contact, and the electrical circuit is thus com- .pleted. By the completion of the circuit the armature-plate E is caused by the magnetic action to swing against the surface d, and this causes the pin e, attached thereto, to projectv through the opening a of the face-plate and throw down the cover-plate,-as indicated in Fig.- 5. By the completion of the circuit also the armature-plate G is caused by the mag netic action to swing up against thc end of the coil in opposition to the action of gravitation and cause the tongue g to strike the signalbell. When the button is released the current is again broken, and no further electrical action takes place, the armatures of the magnets then returning to their normal positions. By

opening the cover-plate of the mouthpiece to answer the call the cover-plate of the indicator is returned to its normal position, as shown in Fig. 3.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is=

In combination with a face-plate, a, having a hinged mouth-piece cover-plate, b, and a hinged indicator cover-plate, c, a magnet, D,

having armature E, with stud c, the armature plate andstud being adapted to throw down the hinged indicator-plate C, and the hinged plate b being adapted to return it to its normal position.

This specification signed and witnessed this 3d day of January, 1883.

JACOB CAPRON. Vitnesses:

A. S. NEWMAN, R. SPARKs. 

